<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
</head>
<body>

<script type="text/javascript">
    var socket;

    if (window.WebSocket) {
        socket = new WebSocket("ws://localhost:8899/ws");

        socket.onmessage = function (event) {
            var ta = document.getElementById("responseText");
            ta.value = ta.value + "\n" + event.data;
        }
        socket.onopen = function (event) {
            var ta = document.getElementById("responseText");
            ta.value = "连接开启!";
        }
        socket.onclose = function (event) {
            var ta = document.getElementById("responseText");
            ta.value = ta.value + "\n" + "连接关闭!";
        }
    } else {
        alert("浏览器不支持WebSocket!")
    }

    function send(message) {
        if (!window.WebSocket) {
            return;
        }
        if (socket.readyState == WebSocket.OPEN) {
            socket.send(message);
        } else {
            alert("连接尚未开启")
        }
    }
</script>


<form onsubmit="return false" action="">
    <textarea name="message" style="width: 400px ; height: 300px" cols="30" rows="10"></textarea>
    <input type="button" value="发送数据" onclick="send()">
    <h3>服务端输出:</h3>

    <textarea name="message" style="width: 400px ; height: 300px" cols="30" rows="10"></textarea>
    <input type="button" value="清空内容" onclick="javascript: document.getElementById('responseText').value=''" >
</form>

</body>
</html>